COMMUNITY FORUM

koltda

07:23AM | 03/04/04
Member Since: 03/03/04
1 lifetime posts
Bvbasement
I want to add an addition and wrap around porch. I need to pour a foundation, (for addition) and slab for the porch. My problem is elevation. I will need to pour concrete against the existing structure above the top of existing concrete, mostly for the porch. The top of the new concrete would have to be a max of about 5-6 inches above existing concrete, butted against wood sheathing. The porch is to be about 6 ft wide and covered. The concrete would have a slight slope away from house. How do I prepare the sheathing for the concrete pour against it? My thoughts on this are to flash under siding with 30# felt & galv metal lapped down over and sealed to the foundation with roofing cement with an expansion joint between new concrete and flashing. With the roof over the joint and slope on concrete, water infiltration should not be a problem. Any thoughts or resources on this?

homebild

06:35PM | 03/04/04
Member Since: 01/28/03
693 lifetime posts
It is not allowable under building codes to install concrete foundations above wood sheathing.

Foundations, by code, must be at minimum at least 8-9 inches above grade and any wood muct be at least 8-9 incheas above grade.

That said, you need to come up with some other kind of structural supports for your proposed addition and porch.

This may involve removing soil so that your porch and additon has a crawlspace with floor level under the existing foundation height or something else.

But your current proposal is completely unworkable and not legal under all known (to me) building codes.

norfleet

11:03AM | 03/07/04
Member Since: 03/06/04
10 lifetime posts
there are two relatively simple solutions. A) leave a 1 inch air gap between the side of the new footing and the existing porch sheathing. You would need to go to your city/county building department to find out what the minimum gap would be (and if this type of solution is possible).

b) raise the top of the porch footing so that it is at the same height as the new footing. This would entail temporary support of the porch roof, remove the lower 12 inches or so of the porch wall, pour a new cap on the exising porch footing and rebuilding the porch wall..
Click_to_reply_button
Inspiration_banner

INSPIRATION GALLERY



Post a reply as Anonymous

Photo must be in JPG, GIF or PNG format and less than 5MB.

Reply_choose_button

captcha
type the code from the image

Anonymous

Post_new_button or Login_button
Register

All bookworms need a good bookmark that inspires them to keep reading. To make this colorful bookmark, cut a rectangular p... It turns out that many bath and kitchen cleansers contain chemicals that are dangerous to the skin and eyes, and often pro... So often we paint tiny nooks white to make them appear larger, but opting for a dark, dramatic wall color like this one—Be... Chocolate-colored walls and large window frames allow the exposed wood beams to take center stage in this small screened p... If you're not crazy about the idea of commingling plants and pool, this modern variation may be more to your liking. The s... Yes, a freestanding garage can become its own tiny house. Artist Michelle de la Vega has all the comforts of a modern resi... There’s nothing like a new set of cabinet hardware to refresh a room. The possibilities are endless: Go modern, rustic, or... Pursue what's known as the stack effect. To achieve it, open the windows on both the upper and lower floors, and as warm a... Like no other floor type, a checkerboard design works wonders to underscore the retro kitchen theme. Vinyl flooring, ceram... Twine lanterns add pops of crafty—but sophisticated—flair to any outdoor setting. Wrap glue-soaked twine around a balloon ... When securely fastened to a tree or the ceiling of a porch, a pallet and some cushioning make the ideal place to lounge. V... Incorporate nature into your lighting scheme by securing a dead tree in a concrete mold and draping your pendant lamp from... For the cost of a can of exterior paint , you can totally transform your porch. Paint the floor a hue that complements yo... In this urban apartment, a standard-issue patio became a serene and green perch by replacing the typical concrete with gro... If you put the washing machine in the mudroom, you can stop the kids from walking through the house in dirty, grass-staine...
Follow_banner_a
Newsletter_icon Google_plus Facebook Twitter Pinterest Youtube Rss_icon
 
webapp2